Re: [Idr] Benjamin Kaduk's Discuss on draft-ietf-idr-te-pm-bgp-17: (with DISCUSS and COMMENT)

Benjamin Kaduk <kaduk@mit.edu> Thu, 20 December 2018 15:41 UTC

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Date: Thu, 20 Dec 2018 09:41:04 -0600
From: Benjamin Kaduk <kaduk@mit.edu>
To: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
Cc: The IESG <iesg@ietf.org>, "draft-ietf-idr-te-pm-bgp@ietf.org" <draft-ietf-idr-te-pm-bgp@ietf.org>, Susan Hares <shares@ndzh.com>, "aretana.ietf@gmail.com" <aretana.ietf@gmail.com>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>, "idr@ietf.org" <idr@ietf.org>
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Subject: Re: [Idr] Benjamin Kaduk's Discuss on draft-ietf-idr-te-pm-bgp-17: (with DISCUSS and COMMENT)
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On Thu, Dec 20, 2018 at 05:02:11AM +0000, Les Ginsberg (ginsberg) wrote:
> Ben -
> 
> 
> 
> Inline.
> 
> 
> 
> > -----Original Message-----
> 
> > From: Benjamin Kaduk <kaduk@mit.edu>
> 
> > Sent: Wednesday, December 19, 2018 7:13 PM
> 
> > To: The IESG <iesg@ietf.org>
> 
> > Cc: draft-ietf-idr-te-pm-bgp@ietf.org; Susan Hares <shares@ndzh.com>om>;
> 
> > aretana.ietf@gmail.com; idr-chairs@ietf.org; shares@ndzh.com; idr@ietf.org
> 
> > Subject: Benjamin Kaduk's Discuss on draft-ietf-idr-te-pm-bgp-17: (with
> 
> > DISCUSS and COMMENT)
> 
> >
> 
> > Benjamin Kaduk has entered the following ballot position for
> 
> > draft-ietf-idr-te-pm-bgp-17: Discuss
> 
> >
> 
> > When responding, please keep the subject line intact and reply to all
> 
> > email addresses included in the To and CC lines. (Feel free to cut this
> 
> > introductory paragraph, however.)
> 
> >
> 
> >
> 
> > Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
> 
> > for more information about IESG DISCUSS and COMMENT positions.
> 
> >
> 
> >
> 
> > The document, along with other ballot positions, can be found here:
> 
> > https://datatracker.ietf.org/doc/draft-ietf-idr-te-pm-bgp/
> 
> >
> 
> >
> 
> >
> 
> > ----------------------------------------------------------------------
> 
> > DISCUSS:
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> > ----------------------------------------------------------------------
> 
> >
> 
> > How are the measurement interval(s) for these TLVs chosen?  I note that RFC
> 
> > 7810 (and 7810bis), as well as RFC 7471, include some text about
> 
> > measurement intervals, in particular, a default value of 30 seconds and in
> 
> > at least one case a requirement for configurability at sub-TLV granularity
> 
> > (thus, TLV granularity for us here).  That said, it's not entirely clear to me
> 
> > whether
> 
> > I'm supposed to treat the measurement intervals as also inherited from
> 
> > 7810bis/7471
> 
> > as part of the "semantics of the value field".  It may be worth a brief clarifying
> 
> > note
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> > in the top-level Section 2.
> 
> 
> 
> [Les:] There is no concept of "measurement intervals" here. The BGP-LS advertisements are simply reporting what the IGPs have advertised.
> 
> Measurement intervals/delays etc. are all done before the information is given to the IGPs to advertise. This is discussed in the IGP specifications.
> 
> 
> 
> Perhaps you will find relevant this exchange between Yoshi and myself in the context of his Tsvart review:

I do, thanks.

Combining this, your description above, and Alvaro's clarification on the
telechat, it's clear that my sickness-addled mind was just confused and
there's no issue here.  I'll go clear in the datatracker now, and sorry for
the noise.

-Benjamin